Patient monitoring device with multiple sensors

a monitoring device and sensor technology, applied in the field of patient monitoring, can solve the problems of plurality of sensors, inaccuracy of readings and false alarms, and rather extensive multiplication of hardware required for parallel measurements, so as to improve the cost-effectiveness of pulse oximeters. the effect of cost-effectiveness

Active Publication Date: 2009-10-20
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]The present invention seeks to provide a cost-effective measurement arrangement for monitoring a patient through a device provided with a plurality of optical sensors. The invention further seeks to improve the cost-effectiveness of a pulse oximeter provided with a plurality of sensors.
[0019]Since the additional hardware needed due to the multiple sensors may be minimized, the invention provides a cost-effective solution for devices intended for performing continuous non-invasive measurements through a plurality of optical sensors. This also translates to minimal area / space requirements allowing the implementation of compact size monitors.

Problems solved by technology

A major problem in pulse oximetry concerns mechanical or motion artefacts, i.e. unwanted motion of the patient, which causes extra noise in the signal and may thus result in inaccurate SpO2 readings and false alarms.
A drawback related to current pulse oximeters providing simultaneous measurement results from a plurality of sensors is the rather extensive multiplication of the hardware required by the parallel measurements.
The integration thus considerably increases the complexity of the device.

Method used

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Embodiment Construction

[0033]A monitoring or measurement device of the invention comprises a computerized measuring unit and a plurality of sensors. The sensors may be attached to multiple tissue sites and / or two or more of the sensors may be integrated into a single probe. Each sensor includes at least one light source, i.e. emitter element, for sending an optical signal and a photo detector for receiving the signal transmitted by the said at least one light source. The number of emitter elements in a sensor depends on the application used. Plethysmographic data, for example, may be measured with only one emitter element (one wavelength), but a pulse oximeter typically has two or more emitter elements in each sensor.

[0034]FIG. 1 illustrates one embodiment of the general measurement arrangement of the invention. A single measurement or monitoring device 10, which is in this example a pulse oximeter, is provided with N sensors 121 to 12N attachable to multiple tissue sites. In the embodiment of FIG. 1, the...

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Abstract

The invention relates to a patient measurement device, especially to a pulse oximeter, provided with multiple sensors. In order to reduce the hardware required by a measurement performed through the multiple sensors, a repeating drive pulse sequence is generated, which contains drive pulses for the emitter elements of the plurality of sensors. Furthermore, each drive pulse of the sequence is supplied to a corresponding emitter element and sensor-specific detectors connected in parallel are employed to produce an electric reception signal received at the measurement device.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]The present application is a continuation-in-part of U.S. patent application Ser. No. 11 / 319,014, filed on Dec. 27, 2005 now abandoned.FIELD OF THE INVENTION[0002]The present invention relates generally to patient monitoring. More particularly, the present invention relates to monitoring devices and systems provided with a plurality of sensors and configured to determine the attenuation of light in a subject. The monitoring device is typically a pulse oximeter.BACKGROUND OF THE INVENTION[0003]Pulse oximetry is at present the standard of care for continuous monitoring of arterial oxygen saturation (SpO2). Pulse oximeters provide instantaneous in-vivo measurements of arterial oxygenation, and thereby an early warning of arterial hypoxemia, for example.[0004]A pulse oximeter comprises a computerized measuring unit and a sensor attached to the patient, typically to a finger or ear lobe. The sensor includes a light source for sending an optical...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): A61B5/1455
CPCA61B5/14552A61B5/14551A61B2562/04A61B2562/227
Inventor LAAKKONEN, MARKO
Owner GENERAL ELECTRIC CO
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